Spark Plugs

¶ The Bible tells us---
"Where no counsel is, the people fail:
but in the multitude of counsellors there is safety."
Proverbs 11:14

So to prevent you from failing Spark Plug reading here is a multitude of counsellors in picture form.

I got all this from a Free hand out I recieved from NGK Spark Plugs back in 1977. I think their Hot-but-OK plug pictures are a bit too hot for me. But who am I to nay say NGK? Enjoy!


1 Oil Fouled	2 Oil Fouled	3 Carbon Fouled	4 Too Cold

5 Too Cold	6 Cold or Rich But OK	7 Cold or Rich But OK	8 Cold or Rich But OK

9 Good	10 Good	11 Good	12 Good

13 Real Good	14 The Best	15 Best	16 Best

17 Best	18 Good	19 Good	20 Good

21 Kinda Hot But OK	22 Hot or Lean But OK (?)	23 Hot or Lean But OK (?)	24 Hot or Lean But OK (?)

25 Too Hot or Lean Pre-Ignition Range	26 Too Hot or Lean Pre-Ignition Range	27 Too Hot or Lean Pre-Ignition Range	28 Too Hot or Lean Pre-Ignition Range

29 Too Hot or Lean Pre-Ignition Range

30
Burned on Antifreeze